GMJ revision SAN 3

If a macerator ran for a long time after flushing, what could be the problem?

• Blockage in the area of the pump within the unit

• Excessive volume of solids

• Incorrect electrical connection

• Timer requires resetting

Where can individual appliance discharge rates be obtained?

• The data plate on an appliance

• Manufacturer’s instructions

• The clerk of the works

• The Building Regulations

If a wastewater lifter pump began to cycle on and off, what could be the reason?

• Intermittent electrical fault on the supply connection

• Excessive volume of waste being processed

• A dripping tap or leaking connection in the house

• A designed self-priming process

When servicing a sink waste disposal unit you discover an excessive amount of debris in the unit. How would you proceed?

• Safely isolate the unit and remove the debris

• Ask the end user questions to ascertain the origin of the debris

• Safely isolate the unit and decommission

• Flush with clear water

If an operational problem were found on a macerator unit, how would you begin to identify a solution?

• Refer to the manufacturer’s fault-finding flow charts

• Strip the appliance and look for an obvious cause of the problem

• Turn on the appliance and check with an approved test instrument

• Remove the appliance and return it to the manufacturer

Which of the following make an air admittance valve (AAV) unsuitable for sanitary pipework installations?

• Venting to atmosphere at intermittent points on the run of the drain

• The inclusion of a stub stack

• An interceptor trap

• A wastewater lifter

Which of the following best describes a cesspool?

• An installation which processes solids and liquids

• A pit where debris naturally permeates into the water table

• A receptacle which stores effluent that is later used as a fertiliser

• An installation that stores solids and liquids that are removed at a later date

If a sanitary installation fails a soundness test, how can any leaks be identified?

• Apply leak detection fluid to joints on fittings

• Remake the joints with silicone sealant

• CCTV

• Carry out a hydraulic test

What is the main factor to consider when selecting a gutter for a dwelling?

• The style of gutter profile

• The angle of the roof

• The roof area

• The amount of available gullies

Who should be consulted before beginning servicing or any type or remedial work on a sanitary appliance?

• The local authority

• The manufacturer

• The customer

• The previous installer